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Image forming apparatus, method for forming image, and program

a technology of image forming apparatus and forming method, which is applied in the direction of printing mechanism, spacing mechanism, printing, etc., can solve the problems of increasing the size, weight, manufacturing cost of the head unit and the printer, and the likelihood of generating density uneven printed image, so as to reduce the degradation of tint, reduce the effect of forming process and reducing the size of the head uni

Active Publication Date: 2017-08-24
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The image forming apparatus described in this patent aims to improve image quality and prevent density unevenness and decrease in black color. It achieves this by controlling the nozzle use proportion, which is the amount of ink discharged from a nozzle compared to the maximum amount that can be discharged. By adjusting the nozzle use proportion, the apparatus can optimize ink usage and reduce the amount of ink needed. Additionally, the apparatus can use different inks to achieve desired colors and prevent degradation of tint. Overall, this patent provides technical means to improve image quality and efficiency in ink usage.

Problems solved by technology

In particular, in a case where ink droplets having large sizes are continuously discharged, there is a case where disturbance of large air flow is generated by the wind pressure accompanying the movement of the head unit and the wind pressure accompanying the discharge of the ink droplets.
When deviation of the landing position of ink droplets having the miniaturized sizes described above increases, density unevenness in the printed image is likely to be generated.
However, in a case where the moving member is added to the head unit, there is a possibility that new problems such as increase in size, weight, and manufacturing cost of the head unit and the printer, or the like are generated.

Method used

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  • Image forming apparatus, method for forming image, and program
  • Image forming apparatus, method for forming image, and program
  • Image forming apparatus, method for forming image, and program

Examples

Experimental program
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embodiment

A. Embodiment

[0029]FIG. 1 is an explanatory diagram illustrating a configuration of an image forming apparatus 10 according to a first embodiment of the invention. In the present embodiment, an image forming apparatus 10 is an ink jet printer. The image forming apparatus 10 forms a printed image by discharging ink droplets based on image data which is input from an outside portion of the image forming apparatus 10 and thus recording ink dots (hereinafter, simply referred to as “dot”) on a printing paper PP which is a medium. The image forming apparatus 10 includes an image processing unit 20 and a recording unit 60. The image processing unit 20 generates dot recoding data which represents a recording state of the dot including color, a size, a position, or the like of the dot which is formed on the printing paper PP from image data.

[0030]The image processing unit 20 is configured as a microcomputer. The image processing unit 20 includes a control portion 40, a RON 51, a RAM 52, an E...

modification example

B. Modification Example

B1. Modification Example 1

[0064]In the half tone processing of the present embodiment, at least, Lk and MLk is set to be discharged, as ink in order to assist Mk and Pk, with respect to the color data of the darkest point. On the contrary, in the half tone processing, ink other than Lk and MLk may be set to be discharged, as ink in order to assist Mk and Pk, with respect to the color data of the darkest point. For example, ink such as LLk, Cy and Ma which are chromatic color may be set to be discharged along with Mk or Pk. In addition, ink of another color may be set to be discharged, in addition to Lk and MLk, as ink for assisting Mk and Pk.

modification example 2

B2. Modification Example 2

[0065]In the present embodiment, the nozzle array 69s of Lk and the nozzle array 69s of MLk are provided with the nozzle arrays 69s of Mk and Pk being disposed between the nozzle array 698 of Lk and the nozzle array 698 of MLk in the main scanning direction. On the contrary, the nozzle array 69s of Lk and the nozzle array 698 of MLk are provided in the same side with respect to the nozzle arrays 69s of Mk and Pk in the main scanning direction. In this case, any one of the nozzle array 698 of Lk and the nozzle array 69s of MLk is provided at a position which is spaced apart from by at least one array of the nozzle arrays 69s with respect to the nozzle arrays 69s of Mk and Pk. In other words, any one of the nozzle array 69s of Lk and the nozzle array 69s of MLk is provided at a position in which the influence of disturbance of air flow which is generated according to the discharge of ink in the nozzle 69 of Mk and Pk is reduced. Accordingly, the generation of...

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Abstract

An image forming apparatus includes a head unit that moves in a predetermined scanning direction and on which a first nozzle which discharges first ink including a black color material, a second nozzle which discharges second ink having higher brightness than that of the first ink, and a third nozzle which discharges third ink having higher brightness than that of the first ink are arrayed in the scanning direction, and a control portion. The control portion is set to perform a conversion processing which sets a type and amount of the ink which is discharged from the head unit according to color data included in the image data and use the first ink, the second ink, and the third ink according to the color data of the darkest point in the conversion processing.

Description

BACKGROUND[0001]1. Technical Field[0002]The present invention relates to an image forming apparatus, a method for forming an image, and a program.[0003]2. Related Art[0004]An ink jet printer (hereinafter, also referred to as “printer”) is known as an example of an image forming apparatus. There is a printer which discharges ink droplets from a nozzle of a head unit while the head unit reciprocating in a main scanning direction and thus forms a printed image on a printing medium (for example, JP-A-2010-179626).[0005]Miniaturization of discharged ink droplets is progressing in order to achieve high-definition of the printed image in the printer. There is a case where ink droplets having the miniaturized sizes are discharged in combination with ink droplets having large sizes in order to form large dots. Wind pressure by discharge of the ink droplets is also generated between the head unit and the printing medium in the printer in which the head unit described above reciprocates in the...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B41J2/045B41J2/21
CPCB41J2/04536B41J2/04586B41J2/2103B41J2/07B41J19/147B41J2/2107B41J2/2121
Inventor KUJIRAOKA, YOICHI
Owner SEIKO EPSON CORP
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